Example Code for Arduino-Get Liquid Level

Hardware Preparation

• Arduino UNO x1
• Liquid level sensor x1
• Purchase Link for Liquid Level Sensor: https://www.dfrobot.com/product-1493.html

Software Preparation

• Arduino IDE V1.6.5 Click to Download Arduino IDE from Arduino®

Wiring Diagram

Other Preparation Work

If using V2.0 version: Open the sensor back cover and use a small screwdriver to adjust the sensitivity knob.

• Turn counterclockwise to increase sensitivity.
• Turn clockwise to decrease sensitivity.

Sample Code

/*!
 * @file  SEN0204.ino
 * @brief  This example is to get liquid level. (Liquid Level Sensor-XKC-Y25-T12V)
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @license  The MIT License (MIT)
 * @author  jackli([email protected])
 * @version  V1.0
 * @date  2016-1-30
 */

int liquidLevel = 0;

void setup()
{
  Serial.begin(9600);
  pinMode(5, INPUT);
}

void loop()
{
  liquidLevel = digitalRead(5);
  Serial.print("liquidLevel= "); Serial.println(liquidLevel, DEC);
  delay(500);
}

Result

If the liquid level sensor detects the presence of liquid, it will output HIGH and turn the LED ON. If no liquid is detected it output LOW and turn the LED off.

Additional Information

Touble Shooting